Max has 40/100 of a dollar. Ben has 2/10 of a dollar. Alex has 3/10 of a dollar. Together, what fraction of a dollar do they have?

Maurice has 54 fewer comic books than rebecca. they have 130 comic books together .how many comic books are in maurices collection ? how many comic books are in rebeccas collection

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle